Thank you Peter for your answer.
The system works, but I try to understand how. My question is about the cinematik of the upper black link.
My understanding : the lower tubular bar between the previous leaf spring axle and the rear axle and the upper " black " link are not is the same plan and the layout is not a parallelogram. When the rear axle moves up or down, the center distance of the bolts’axe of the " black " upper link varies and is compensated by the deformation of the rubber bushes. The deformation of the rubber bushes brings stiffness, like an additional spring, in order to stabilize the rear axle in all directions. I don’t know if I am right.
Last edited by CBY; 13/03/16 04:41 PM.